Door-check.



No. 669362. Patented Mar. 2, ao.

- s: w. PEREGBINE.

noon CHECK.

' (Application filed Oct. 27, 1900. (Il'o Model.)

UNITED STATES PATENT OFFKICE.

SEYMOUR W. PEREGRINE, OF PORTLAND, MAINE, ASSIGNOR TO THE E. T.

- BURROWES COMPANY, OF SAME PLACE.

noon-CHECK.

.' SPEGIFICATION forming part of Letters Patent No. 669,'762, datedMarch 12. 1901.

Application filed October 27, 1900. Serial No. 34,607. (No model.)

TO OLZZ whom it mal/y concern:

Be it known that I, SEYMOUR W. PERE- GRINE, a citizen of the UnitedStates, residing at Portland, in the county of Cumberland and State ofMaine,have invented certain new and useful Improvements in Door-Checks;and I do hereby declare the following to be a full, clear, and eXactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to an improvement in doonclecks; and it isembodied in the construction and arrangement of parts presently to bedescribed, and defined in the claims.

Heretofore many attempts have been made to secure a door-check whichwould permit the closing spring or power to close the door gradually,and so without the occurrence of sudden jars or stops. Such devices aredesired more particularly in connection with light framework, such asscreen-doors, although they are also desirable in connection with theordinary door. i

My invention is designed to provide a construction and device Wherebythe door may be moved to its various positions without requiring forceto overcome a resisting power usually present in the known type ofchecks, such as the com mon form of pneumatic check and closer.

Afurther objectis to provide a device which will act promptly andgradually and, further, to avoid the use of a nultiplicity of parts,joints, and toggle mechanism, all of which have been used heretofore inconnection with combined checks and closers. i

My present 'invention is intended and designed for use as a check only,and as such is employed with other means for closing the door.

While I have shown a construction and arrangement of device which hasproven emi` nently satisfactory, yet I desire it understood that theform illustrated and presently' to be described is illustrated for thepurpose of this specificaiion only and not for the purpose oflimitation, as various changes can be made without departing from theinvention.

Figure 1 is an elevation of a section of a door with the frame and checkas applied. Fig. 2 is a plan View showing the door and frame in section,and Fig. 3 is an enlarged detail view showing the relative positions ofthe check and iframe when the door is open.

A designates the door-frame, and B the door, and in this connection Iprefer to employ the closing-spring O, having a connection with theupper portion of the door-frame and the outer portion of the door. Thesesprings are at present well known in the market and largely used and are'intended for the purpose of closing the door and retaining it closed.Conveniently below the spring or at any desired point is secured acylinder D, the same having its end wall d turned at right angles toform a securing-flange d', through which suitable screws are passed forsecuring the same to the door. The end wall is provided with the usualperforation stoppered by a regulating-screw D', having a tapered side,thus forming an adjustable port for the supply and eXhaust to and fromthe cylinder. The cylinder D is Conveniently arraged at an incliue, asshown in Fig. 2, and is of a suliiciently rigid Construction to preserveits position and shape, the same being prefer-V ably connected with theend portion in any convenient manner. The opposite end of the cylinderis open, as shown, and within the cylinder is placed the piston E,working snugly therein and serving the usual purpose ofdrawing in airas. the piston is moved outward and compressing the same as it is movedinward. The piston carries an extended rod F, the length of which isconveniently such as to carry the end into engagement With the door-jambaas the door is being closed and when closed. The outer end of the rod Fis supported and passed through a standard H, having a guiding head orsleeve h at its outer end, the same being arrauged at a slightinclination to agree with the inclination ot the cylinder, thus avoidingclamping. rod F is designed to move freely through the sleeve h, and itsend has sleeved tlereon a coil-spring K, one end of which is firnlysecured to the rod, as at Ic, while the opposite end abuts against theedge of the sleeve h. The tension of the spring K is such as to forcethe rod, with its piston-head, outward until the end of the rod extendsbeyond the plane of the edge of the door when the latter is The ICO

open, as shown in Fig. 3. The spring also serves to assist in theretardation of the door in its closing' movement, as will be apparent.

On the jamb a is secured a curved abutment-plate L, the curvaturethereof being substantially on the arc of the movement of the door. Thisplate is Conveniently secured in position by screws, and its curved endis normally projected outward, as shown.

To retain the rod, together with the piston, in their normal position orto prevent their disassociation, a suitable pin fis employed, whichnormally engages the sleeve h when the door is open and the rod forcedout.

In operation the tension of the spring C, as stated, will close thedoor, and as the door is swinging to the end of the rod F, which may beconveniently shod with a round knob projection f', is first brought intocontact with the curved outer end of the plate L. The rod meeting thisobstruction is thereupon forced inward, compressing the spring and atthe same time the air in front ot' the piston. The air being permitted aslow escape through the port serves, in conjunction with the spring, toquietly resist the closing of the door; but their united strength isunequal to that of the spring C, which eventually draws the doorsclosed, thus accomplishing the object desired.

In the drawings is shown the round knob or projection f' at the end ofthe rod. It might be stated that the same may be changed or varied, butthat it is preferable to have a curved surface at the point to avoidfriction.

The object of forming the curved abutment is to preserve a uniformpressure on the rod, the same first striking the curved outer portionand gradnally novingdown toward the inner portion thereof as the doorcloses. In this device it will be observed that the butter in no wiseinterferes with the opening of the door owing to the fact that it is notconnected with the door frame or jamb.

Another important advantage gained by the construction above describedis that the buffing or impeding of the inward movement of the door iseXerted on the jamb at the hinged edge of the door, and so atsubstantially right angles to the door, thus securing a result which isdesirable.

Having thus described the invention, what is claimed as new, and desiredto be secured by Letters Patent, is

1. In a door-check, the combination with a frane and a swinging door, ofa buft'er comprising a reciprocating member carried by the door andindependent of the frame, means for normally forcing the member towardthe frame, an abutment on the frarne With which the reciprocating memberengages during the closing and closed period of the door, substantiallyas described.

2. In a door-check, the combination with a reciprocating member andmeans for resisting the movement of the member in one direction andmeans for moving the member in the opposite direction and anabutment-plate associated with and detached from the said reciprocatingmember against which the latter engages as the door is closed,substantially as described.

3. In a door-check, the combination with a door and its frame, of a rodhaving a free end arranged on the door and adapted to engage the france,a spring for normally forcing the rod outwardly, an air-compressingcylinder,

and a piston on the inner end of said rod working in said cylinder,whereby the movement of the rod is resisted in one direction and theclosing movement of the door checked, substantially as described.

4:. In a door-check, the combination with a door, of a cylinder thereon,a reciprocating rod having a piston at one end fitted in the cylinderand a free opposite end, of a spring on the rod, a support for the freeend of the rod and means for preventing the escape of the rod from thecylinder, substantially as described.

5. In a door-check, the combination with a door and its frame, of meansfor closing the door and a check comprising a reciprocating member,means comprising a spring and an air-cushioning device for resisting themovement of the reciprocating member in one direction and a curvedabutment-plate on the frame and with which the free end of thereciprocating member engages, su bstantially as described.

6. A door-check consisting of a rod having a rounded free end, a springsleeved on the rod, a guide for the rod against which the spring abuts,a cylinder, a piston on the rod working in the cylinder, and means foradmitting air to and from the cylinder, substantially as described.

'7. A door-check consisting of a rod having a spring sleeved thereon, aguide for the rod against which the spring abuts, a cylinder, a pistononthe end of the rod working i-n the cylinder, in combination with astationary curved abutment-plate independent of the rod arrangedadjacent thereto, substantially as described.

8. The combination with a door, of a check comprising a reciprocatingmember Secured IIO to the side of the door and movable on a plane xsubstantially parallel With the side of the door, means for normallymoving the end of the member beyond the plane of the edge of the door,and yielding means for resisting the backward movement of the memberduring the closing movement of the door, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

SEYMOUR W. PEREGRINE.

Witnesses:

ARTHUR R. MAOLEOD, HELO H. KING.

